Panic attack? Depression? Anxiety disorder? Learn the symptoms.

Depression and anxiety are the most common mental-health disorders in the U.S., affecting more than 20 percent and 28 percent of American adults, respectively, at some point in their life, according to the National Institutes of Mental Health.

May is Mental Health Month, and the Eastern Virginia Medical School's Department of Psychiatry and Behavioral Sciences offered these symptoms, from the “Diagnostic and Statistical Manual of Mental Disorders,” to help spot depression and anxiety.

Symptoms of depression (occurring nearly every day):

Depressed mood most of the day. For example, feeling sad or empty or being tearful. (Children and adolescents may be irritable.)

Decreased interest or pleasure in almost all activities most of the day

Significant weight loss or gain despite no deliberate change in diet, or a decrease or increase in appetite

Trouble sleeping or oversleeping

Feeling restless or significantly slowed down

Fatigue or loss of energy

Feeling worthless or excessively guilty

Difficulty concentrating or thinking clearly.

Recurrent thoughts of death (not just fear of dying) or suicidal thoughts

Feeling hopeless

Symptoms of an anxiety disorder:

Excessive worry occurring more days than not for at least six months. The worries could be about a number of events or activities, such as work or school performance.